Type-writing machine.



E. H. LORENZ. TYPE WRITING MACHINE. APPLIUATION FILED APKJG, 1909.

Patented Dec. 30, 1913.

2 SHEETS-SHEET 1.

- 'E. H. LORENZ. TYPE WRITING MAGHINE. APPLICATION TILED APR. 16, 1909.

Patented Dec. 30, 1913.

2 SHEETS-$81321 2.

INVENTOI? ATTBHNEYS.

,' as will enable "UNITED STATES PATENT omucn.

EDWARD H. LORENZ, OI HARTFORD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- mmf'rs, To 'rnn NOISELESS v ryrnwnrrnn NECTICUT, A CORPORATION or CONNECTICUT.

COMPANY, OF MIDDLETOWN, CON- TYPE-WRITING- IACHINE.

Specification of Letters Patent.

Application filed April 1c, 1909. Serial a... 490,301.

Patented 11.0.30, 1913.

Be it known that I, EDWARD a citizen of the United States, residing at -Har tford,--in the county of Hartford and State of Connecticut, ave invented certain new and useful Improvements in Type- Writin -Machines, of which the following and exact description, such others skilled in the art to which it appertains to make and use the same.

a writing machines and more This invention relates broadly to typearticularly to the escapement mechanism 0 a machine of a type adapted to effect printing noiselessly.

' ntypewriting machines as hitherto constructed a large part of thenoise incident I been produced parts of the escapeand one of the objects of present invention is to provide new roved mechanism for overcoming and imp this'ob ection and which will render the operation of the escapement mechanism substantially noiseless.

Other objectswill be in part obvious andart pointed out hereinafter.

in he invention accordinglycons sts 1n the features of construction, combinations of elements. and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the folp is illustrated two of various bodiments of the invention, F1

-lowing claims.

Inithe accompanying drawings, wherein possible emview inplan, showing the pre erred form of this escapement; Fig: 2 is a side View .thereof; Fig. 3 is an end view looking toward the left of Fig. 1, theescapement wheel and other parts being omitted in the in- .terest of clearness and illustration; Fig. 4

is a sectional view takenon' line 4-4' of Fig. 1, looking in the direction of the arrow; Fig. 5 represents several parts shown in Fig. lbut in another position; Fig. 6 is a' sectional view' taken on line 6-6 of Fig. 5'lookin in the direction of the arrow; Fig. 7 s ows the parts illustrated in Fig. 5 in-the backspacing position; Fig. 8 is 'a sectional view taken on line 8-8- of 'F' 7 Fig. 9 is a View in plan of a dilferent en iiodiment of my invention; Fig. 10 is a Loam, .F

ure 1 is a' side view thereof; Fig. 11 is an endview of 1g. 9, with certain parts omitted; Fig. 12 IS a sectional view on the line 12-42 of F g. 9 looking in the direction of the arrow; =F1g. 13 shows the parts of Fig. 9, but in another position; Fig. 14 is a sectional view on the hue 14.14 of the direction of the arrow; Fig. 15. illustrates the parts of-Fig.

osition; Fig. 16 is ing a sectional view on me 16-16 of Fig.

the 15 looking in the dlrectlon of the arrow.

Similar reference characters refer to similar 'rts throughout the several views of the rawings.

. Referring-now to the drawings, and par.- ticularly to the embodiment of my invention illustrated in Figs. 1 to 8, inclusive, 1 represents the frame of the machine carrying the pivot screws2 upon which the escapement rocker. 3 and rocker-shaft 4 oscillate. The

fixed-dog is represented at 5 attached to the pivoted upon a bushing by the screw 7 on the below the screw-headland coil spring 13 is connected at one en to the cam member at 14, and at the opposite end to a p0st'15upon the rocker 3. 16 represents the escapement-shaft, and 17 the escapement wheel, a tooth of said wheel normally bearing against the tooth of the movable dog 6, as shown in Fig. 1, the carriage at this point being held in this position the cam surface 10 and, as will in the present instance the parts are so positioned that a slight space is left between the face of the tooth ofthe movable dog 6 and the face of the fixed dog 5. (See Figs. 1 and 4.) Having described the construction of this embodiment of my inventiomthe opthe rolling cam 9 rests against be observed,

eration thereof may now be understood.

Fig. 13, looking inupper part of the escapement rocker 3, and 1 13 in the back-spacbushing serving as a guide dog. It will be understood '90 ally attached at l2to" the movable do 6. A

its normal position of rest.v In

I, which oscillates the rolling cam 9 from the shown at 20 attached td wheel, and is also provided .with a slot 1 An arm 24: also extends from the movable d I into engagement -,it is desired to back-space the carnage,

Upon depressing the rocker 3, the tooth of the movable dog 6 will be released from the tooth 18 of the escapement. wheel, allowing the tooth 19 to drop upon the fixed dog5, as shown in Figs. 5 and 6. The movable dog, upon release, jumps forward to the position shown in these two figures, being impelled to that position by means of the" spring 13 position shown in F1 1 to that shown in 5, the curved sur ace of the cam '9'rolling upon the curved surface 10 of the rocker. When the rocker is moved upwardly again, the next tooth of the escapemen't wheel engages the movable dog 6 and drives the same forward against the resistance of the spring 13, which, taken with-the rolling cam surfaces 9 and 10, forms a noiseless stop. Whpln t e escapemen wheel 17 is pushed rearwardly by any suitable means, fromthe position shown in Fig. 1 to that shown-1n Fig. 7, when the movable dog 6 passes in front of the tooth 38. While passing into this position (Fig. 7), the circular cam 9 will be rocked to a greater distance as shown, again tensioning the spring 13. After the tooth 38 of the wheel 7 shall have passed over the tooth of the dog 6 and is in front thereof, the spring 13, cam 9 and dog 6 will assume the positions shown in Fig. 5, and the tooth 38 (Fig. 7) will assume the position there shown by the tooth following tooth 19 in Fig. 5.

' In the embodiment of the invention shown .in Figs. 9 to 16fincli1sive, the fixed dog is the rocker 21. The movable dog is provided with a finger 22 for engaging the teeth-of the escapement which engages with a guide-screw or pin 23.

with-a roller 25 support upon the rocker 21. The movable dog is also provided with a post 26 to which is secured a spring 27 the opposite end of said spring being secured to an extension 28 of an oscillatory curved cam member 29, said cam being provided with a trunnion pivoted to the rocker member. The curved surface of cam 29 bears against the curved surface 30 of the movable dog. In the position shown in Figs. 9,10and12 the carriage is in its normal position of rest,the tooth 31 of the escapement resting against the movable dog 22. In that position, the oscillatcam 29 serves as a stop for the movable dog, in" which position the coil spring 27 is ,under tension. A plate 32 is positioned upon the rocker 21, and this plate, in conjunction with the head ofscrew 33, holds the movable dog in position upon the rocker member, the dog being free to slide beneath said plate. When the rocker member is moved from the position shown in Figs. 9, 10 and 12 to that shown in Fig. 13, the es- 1 insane? capement tooth 31 will be released from the finger 22 of the movable dog and will rest upon the fixed dog 20. The movable dog, being released, will jump forward as shown in Figs. 13 and 14, being forced to such position by means of the oscillating cam, the curved surface of which rolls upon the curved surface 30 of the movable dog, such operation being effected by means of the coil spring 27 which drawsthe cam 29 to the position shown in Fig. 13. When the rocker member 21 is moved in the opposite direction, the next. escapement tooth engagesv with the finger 22 of the movable dog and moves that dog to the position shown in Fig. 9 against the resistance of the spring 27 and the curved cam 29, said ca m rolling against the surface 30 and brin 'n the movable dog and the escapement w cc to a noiseless stop. In order to back-space the escapement wheel 3 1, that wheel is pushed backwardly, by any suitable means, in the direction of the arrow in Fig. 15 from the position shown in until finger 22 of the movable dog passes over or esgapes in front of the tooth 41. During thatmovement, the movable do will pivot upon the screw 23, the arm 24 o the dog leaving the roller 25 to a slight extent, and the curved surface 30 also leaving the curved surface of the cam 29 a slight extent, enabling the cam and the spring to be drawn into substantially a straight line, as shown. in Fig. 15. When the tooth 41 passes in front f the finger 22, the parts will assume the position shown in Fig, .13, the tooth 41, however, shown of the tooth-35 of that figure.

It will, accordingly, be provided mechanism well-adapted to attain, among others, all the ends and objects above being in the position seen that I have v enumerated in an exceedingly simple, yet

efiicient manner.

It will be observed that the entire opera- I tion of feeding the part to be spaced, which in the present instance is an escapement wheel, takes place without impact or concussion,,'-and therefore noiselessly, and yet the partsvare accurately and positively arrested in the positions to which they are adapted to be moved While the proportions of the co-acting cam members may be varied to any different requirements, it is desirable in the embodiments of the invent-ion'herein described that one, should be substantially twice the diameteriof the other. This insures a pure rolling contact between the cam surface and insures against friction which might result if'the surface were allowed to slip or slide one upon the other.

' When the feed-dog does not move in a straight line, as in Figs. 1 to 8, the arresting of the parts in the proper positions may be secured by varying the proportions another.

saidrac 'ing with the teeth will be silently arrested movable dog-engaging therewith, and pivof the cams or changingjltl ie location of the spaced, of spacing means therefor comprispivot of the smaller cam, as shown herein. ing a dog-carrying, rockin member having v, .wAsvmany changes could bein'ade in the a cam surface and provi ed with a fixed a .ve construction and many apparently detaining dog and swinging feed-dog, and 5 widely difi' rent embodiments'of this inven a rolling cam member interposed between tioncould be made without departing from. the movable feed-dog and saidrocker memi the scope thereof, it is intended that all matber coacting with said cam for arresting ter contained in the above description or the movements ,of the swingin dog when shown in the accompanying drawings shall t e same is engaged with the e ement to be 10 be, interpreted as illustrative and not in a spaced. limiting sense. r 8. In an escapement mechanism, the com- Having described my invention, what I bination with an element to be spaced, of claim as new and desire to secure by Letspacinglmeans therefor comprising a dogter P t t carrying member havin a cam surface and 15 1. In an escapement for typewriting maprovided with a fixed etaming dog and a g chines, the combination with the member to swinging feed-dog, a tooth mounted upon be spaced, of a rocker member, a fixed dog the swinging dog, and means interposed besecured to one side of said member, a pivtween said tooth and said rocker member 2o opposite side of said member, and means rest the former and the swinging feed-dog mounted on the dog for arresting its movewhen the tooth is engaged 'with the member ment. to be spaced and moved therebyinto sub- 2. In escapement mechanism for typestantial alinement with the fixed do writing machines, coacting-escapement de- 9. 11 an escapemen-t for typewritmg ma- 25 vices comprising a rack member, a movable chines, the combination with the member dog adapted to coact therewith, and an ecto be spaced, of spacing means therefor oomcent-ric mounted on said dog to silently arprising a vibratory dog holder, a fixed do rest its movement and the movement of the secured to one side thereof, a movable dog track when s'aidrack and dog engageone' carried on the opposite side t er and V I cam means on'the movable dog for silently 3. In escapement mechanism for 'type-' arresting the movement of said movable dog writing machines, coacting escapement deat a predetermined point in advance of said vices comprising a rack, a pivotally mounted fixed 0g. 7

feed do adapted to coact with the teethof "10. Inan escapement mechanism, in com fi, an eccentric mounted on said feed bination, a member to be spaced, and spac- 10g dog,.and spring means connected with one mg means therefor comprising a vibratory I of said members adapted'to hold said feed member havingv a fixed detaining. dog

dog in forward position to engage the teeth mounted thereon, a movable feed-dog pivotof the rack whereby its movement on coactally mounted thereon, said feed-dog being member to be spaced, said vlbratory member having a cam surface and a pivotally mounted rolling member connected with said tooth coiiperating with the cam surface of said by means of the spring and eccentric mechamsm; T I V I 4. an' escapement mechanism, the com- 'nation' with a member to'be spaced, of a ota'lly mounted rolling cam means coop crating with said dog and adapted to arrest t e movements thereof in both directions. In an 'esca eme'nt mechanism, the com-" 50 bination with e member to be spaced, of

of the feed-dog when the tooth thereof'is engaged with the member to be spaced and moved thereby into engagement with the detaining dog, and for returning the movable dog to. an intermediate position when the tooth thereof 13 disengaged from the memher to be spaced. v 11. n an escapement mechanism for typewriting machines, in combination, a member to be spaced, a vibratory carrier provided 55v 6. 11 an escapement for typewriting maer to with a fixed detaining dog and swlnging chines, the combination with the mem be spaced, of spacing means therefor comprising a vibratory dog holder, a fixed dog on one side thereof, a movable dog carried 60 on the opposite side thereof, and means on one of said dogs for silently arresting the movement of said movable dog at a predetermined point in advance of said fixed dog. In an esca'pement mechanism, the com- 65 bination with an element adapted to be sald vibratory member having a curved cam surface, a member connected with said tooth andhaving a surface adapted. to roll with relation to the cam surface, and adapted to arrest said tooth in substantial alinement with the fixed dog when the same has been engaged with the member to be spaced and provided with a tooth for engaging the 105 vibratory member to arrestthe movements 11oside of such position,

' writing machines,

moved thereby, and a tension spring connected with said rolling member;

12. In an escapement mechanism for typewriting machines, the combination, of a member to be spaced, a rocker member, a feed-dog pivotal y mounted thereon adapted normally to rest in an intermediate position but capable of being swung to either and rolling cammeans interposed between the pivotally mounted feed-dog and said rocker member adapted to arrest the movements of said dog when the same is moved to. either side of its normal position, and spring means cooperating with said cam means for arresting the feeddog in its intermediate position.

13. In an escapement m%hanism for typethe com ination with the member to. be spaced, of a rocker member, a pivotally mounted feed-dog carried thereby, a 'tooth carried by the feed-clog, and

' rolling cam means connected with said tooth of when the latter has holder,

holds the feed-dog in an inwhich is adapted to and the tooth there been engaged with the member to be spaced and moved thereby.

14. In an escapement mechanism for typewriting machines, the combination with the member to be spaced, of a vibratory doga swinging dog mounted thereon, a tooth mounted upon the feed-dog, and a member having a rolling engagement with the dog-holder adapted to arrest the movements ofsaid tooth and the feed-dog when the former is engaged with the member to be spaced and moved thereby.

15. In an escapement. for typewriting machines, the combination with the member to be spaced, of spacing means therefor comprising a vibratory dog holder, a fixed dog secured to one side thereof, a movable dog carried on the opposite side thereof, and spring actuated cam controlled means for arresting the movement of said movable dog at a predetermined point in advance of said fixed dog.

16. In an escapement mechanism for typewriting machines, the combination with the member to be spaced, of spacing means therefor, comprising a vibratory dog-holder, a swinging feed-dog carried thereby having an engaging tooth, a curved cam surface provided on the dog-holder, a'rolling cam which normally termediate position but arrest the said feed-dog member connected with said tooth adapted to roll withrelation to the cam surface of the dog-holder and arrest said tooth when the same has been engaged with the member to be spaced and moved thereby, and a spring normal position when the same has been disengaged from the member to be spaced.

17; In an escapement for typewriting machines, the combination with the member to be spaced, of spacing means therefor comprising a vibratory dog holder, a movable dog carried by said dog holder, a cap for holding said movable dog in proper position during its movement and-means secured to one side of-said rocker'member adapted to aid in silently arresting the movement of the movable dog on the other side of said rocker member.

18. In an escapement mechanism, the

combination with an escapement wheel, of

means therefor comprising a rocking me r, a fixed dog and a movable dog thereonjfcam means for silently arresting the movable dog slightly in advance of said sp aGin fixed dog whereby the teeth of the escape-- ment wheel will engage said fixed dog'when released from the movable dog and an actuating spring between said'cam means and rocker member.

19. In an escapement mechanism, the

combination of a vibratory dog carrier, a

loosely mounted movable feed-dog carried thereby, said feed-dog being provided with a cam surface, and spring-actuated means coiiperat-ing with said cam surface to ,posi-. tion said dog. f

20. In an escapement loosely mounted, movable feed-dog carried thereby and provided with a cam surface,

and a spring-pressed member mounted upon said idog carrier and cooperating with said mechanism, the combination of a vibratory dog carrier, a'

connected with said rolling member adapted to return said dog and tooth tofeed-dog and the cam surface thereof to ar- I rest a movement of thelatter 'in either direction. 1

Intesti mony whereof I afiix my signature, in the presence of two witnesses.

EDWARD H. LORENZ.

Witnesses: I

Cums H. Sronns,

NELLIE Pnonmx.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

